what is the use of doing pvremove on sda4?? you just rip the disk off
and dump it in the wastebin.
to remove a pv from a vg you use vgreduce, but i assume you already did
that, judging from the pvdisplay.

I don't see it mounted anywhere. The LVM is also unmounted. Any ideas of what I might be doing wrong ? I am running LVM 2.02.39 on Ubuntu 9.04 64bit